Adapter



FIG. 1 is a front perspective view of an adapter in a first state showing the claimed design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the figures show portions of the adapter that form no part of the claimed design. 

CLAIM The ornamental design for an adapter, as shown and described. 